Home / 7,125.60-10,688.40-1,931.48

Finding the Fourth Proportional to 7,125.60, 10,688.40 and 1,931.48

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Solution

The fourth proportional to 7,125.60, 10,688.40 and 1,931.48 is: 2,897.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.60 : 10,688.40 = 1,931.48 : x
  2. Step 2: Convert to fraction form
    7,125.60/10,688.40 = 1,931.48/x
  3. Step 3: Cross multiply
    7,125.60x = 10,688.40 × 1,931.48
  4. Step 4: Simplify right side
    7,125.60x = 20,644,377.39
  5. Step 5: Solve for x
    x = 20,644,377.39/7,125.60
  6. Step 6: Final answer
    x = 2,897.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.